Home / 4,971.12-6,857.89-3,977.79

Finding the Fourth Proportional to 4,971.12, 6,857.89 and 3,977.79

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Solution

The fourth proportional to 4,971.12, 6,857.89 and 3,977.79 is: 5,487.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,971.12 : 6,857.89 = 3,977.79 : x
  2. Step 2: Convert to fraction form
    4,971.12/6,857.89 = 3,977.79/x
  3. Step 3: Cross multiply
    4,971.12x = 6,857.89 × 3,977.79
  4. Step 4: Simplify right side
    4,971.12x = 27,279,246.26
  5. Step 5: Solve for x
    x = 27,279,246.26/4,971.12
  6. Step 6: Final answer
    x = 5,487.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.